| 摘要 |
PROBLEM TO BE SOLVED: To make a transmitting processing for data efficient by arranging the dual-port RAM between two CPUs and sectioning the RAM into synchronous access areas and asynchronous access areas. SOLUTION: The dual-port RAM 1 is arranged between the two CPUs 2 and 3 and provided with a synchronous access area A1 which is accessed in synchronism with an interruption signal 4 from a master-side CPU 2 to a slave- side CPU 3 and a synchronous access area A2 for access from the slave-side CPU 3 to the master-side CPU. Further, the RAM is provided with an asynchronous access area B1 which is accessed without synchronizing with the interruption signal 4 from the master CPU 2 to the slave CPU and an asynchronous access area B2 which is accessed without synchronizing with the interruption signal 4 from the slave CPU 3 to the master CPU 2. Thus, the area is divided to efficiently transmit data.
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